Fitness
Optical Heart Rate Sensor
An optical heart rate sensor uses green or infrared LEDs on the wrist to detect pulse via photoplethysmography (PPG)—convenient but sensitive to fit, motion, and skin tone. Accuracy drops during sprints, lifting, and cold hands.
An optical heart rate sensor uses green or infrared LEDs on the wrist to detect pulse via photoplethysmography (PPG)—convenient but sensitive to fit, motion, and skin tone. Accuracy drops during sprints, lifting, and cold hands.
Tighten the band and compare occasional chest-strap sessions to spot drift.
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